Human beings can become intelligent life and form human civilization, which has a close relationship with human beings. It is the human ancestors of the ancient times who gathered to live together, able to continuously exert their collective wisdom, stand at the top of the food chain step by step, and become the hegemon of the earth.
It can be seen that human beings do not like to be alone, and human society also relies on the wisdom of the group to embark on the road of science and technology hundreds of years ago and rapidly develop the current era of technological civilization. Living on the earth, human beings will not feel lonely. On this planet, there are billions of human beings, and there are more than millions of creatures accompanying us.
Therefore, we who live on the earth will not feel lonely, even if you are in the desert, you will also feel the cordial breath of life on the earth. But as human beings walked out of the earth, we felt lonely. Standing in the starry sky outside the earth, we were free from the breath of life on the earth. Although the surrounding starry sky was beautiful, it brought us loneliness.
This is why the astronaut’s choice of psychological quality is a very important level. Without a strong psychological quality, going to space or performing missions on other planets will easily develop mental illness due to loneliness and other reasons, which will bring impossibility to space missions. The trouble of control.
Why do humans feel lonely in space? Mainly it is the extraterrestrial life and extraterrestrial civilization that we have not found in the universe. Mankind walked out of the earth in the last century. When mankind first saw the vast universe, in addition to feeling the vastness of the universe and the smallness of the earth, we were also thinking about the possibility of extraterrestrial life.
We know that human beings are very small in the universe, and the exaggerated scale of the vast universe and its age of 13.8 billion years make it difficult for us to doubt the existence of extraterrestrial life. In the eyes of many people, there is no doubt about the existence of alien life and alien civilization. Scientists also believe that alien civilization exists, but before they are found, everything is just speculation.
Human beings have been searching for traces of the existence of extraterrestrial life and civilization through various methods in the more than half a century since they walked out of the earth. In the solar system, scientists have the highest expectations for extraterrestrial life is Earth’s neighbor Mars. In addition to the many similarities between Mars and the Earth, through a large number of observations, scientists believe that the possibility of life on Mars is very high in ancient times as well as in modern times.
Human beings search for traces of life by continuously launching probes to Mars, and my country’s Tianwen-1 successfully landed on Mars yesterday, starting the journey of Mars exploration and life search. Of course, even if there are extraterrestrial life in the solar system, it will only be simple or slightly more complex innocent life.
We want to find a smart civilization, so we can only look beyond the solar system. In the 13.8 billion years of the universe, countless galaxies have been bred, and every galaxy like the Milky Way has hundreds of billions of stars. Existence, there will be a varying number of planets around each star, and many of them are terrestrial planets very similar to the Earth.
In theory, every star system will have a habitable zone, and the terrestrial planets in the habitable zone will most likely have liquid water. Even if the probability of life in each star system is very small, as long as it is not careful, the number of living planets will be very alarming under an exaggerated base.
So theoretically speaking, the universe should be very “lively”, but scientists have not found any traces of extraterrestrial life in billions of years of searching. The entire universe feels “quiet”. This result is particularly unusual, and it is also the core content of the “Fermi Paradox.”
In order to explain the “Fermi Paradox”, scientists have put forward various hypothetical theories. Some scientists speculate that the solar system is the laboratory of extraterrestrial civilization, and humans are the “little mice” in this laboratory; some scientists believe that our The universe is a virtual world, a virtual space created by an advanced civilization. Everything in the universe is nothing more than a variety of digital programs.
The theories in these conjectures are not recognized by many people. In the eyes of most people, the reason why we feel that the universe is very “quiet” is mainly due to the exaggerated spatial distance. We all know that the distance of the universe is based on light-years. Whether it is the distance between stars or the distance between galaxies, it is an insurmountable sky for humans. This sky moat hinders the communication between civilizations. If you want to realize the communication between civilizations, unless you have the ability of interstellar navigation, you can explore across the interstellar.
The closest star to the sun is Proxima Centauri, about 4.2 light-years away. Proxima Centauri and Alpha Centauri form a three-star system. In this three-star system, there are also unknown planets and various small celestial bodies.
Speaking of this Samsung system, some people may feel unfamiliar, but when it comes to the novel “Three-Body”, I believe many friends know it. The three-star system of the Proxima Centauri is the prototype of the trisolaran star in the science fiction novel “Three-Body”. In “Three-Body”, the three-body civilization is very powerful, and it almost destroyed human civilization.
After the “Three-Body” novel became popular, people naturally became infinitely interested in the three-body galaxy in reality. So in this three-star system in reality, is there a living planet or even a Trisolaran civilization? In fact, scientists have been conducting the exploration of the Biling galaxy, after all, it is the closest star system to us.
After decades of research and exploration in comparing neighboring galaxies, scientists finally discovered a special planet in 2016. This planet is named Proxima b, and its mass is similar to that of the Earth. It is also a terrestrial planet with a revolution period of only 11 Earth days, indicating that it is very close to its parent star, only about 7.5 million kilometers.
If it is in the solar system and the distance between the planet and the star is so close, it must be a purgatory planet, and there can be no life. However, it is different in Proxima Centauri. As Proxima is only a red dwarf with a surface temperature of only 2700 degrees Celsius, its habitable zone is closer to the star. Proxima B is located in the habitable zone.
Therefore, scientists believe that there should be liquid water on the surface of this terrestrial planet, and there may be life if there is liquid water. Although in the opinion of some scientists, even in the habitable zone at such a short distance, the stellar radiation received is 400 times stronger than that of the earth. With such high-intensity radiation, can life be born and evolved?
In fact, our knowledge of life is still very small. In the eyes of many people, life can only be born and evolved under a suitable radiation environment. However, according to the research of scientists, the original earth received a higher degree of solar radiation than Proxima Centauri b. Even so, the earth gave birth to original life and began to evolve 4 billion years ago.
Therefore, high-intensity radiation is not an absolute condition under which life cannot be born. Even in a high-radiation environment, life can still be born and evolve. Therefore, many scientists speculate that Proxima b, which has a mass similar to that of the Earth, may have given birth to life, and even evolved intelligent life like humans.
If scientists’ guesses are correct, then humans should be careful. Proxima Centauri is only 4.2 light-years away from us. This distance is naturally impossible for current human technology to cross, but crossing this distance does not require much interstellar navigation capabilities, nor does it require the ability to fly faster than light. You only need to be able to increase the speed of the spacecraft to sub-light speed to go.
If the alien civilization of the neighboring galaxy is stronger in science and technology than that of humans, and has been able to fly at the initial subluminal speed, then the fleet of the neighboring galaxy may already be on its way to the solar system.